What should I overclock?

Edvinbeast

Commendable
Jun 19, 2016
14
0
1,510
I just installed my new i5 4670k and ASUS R9 390 and I'm really happy with the increased performance!
I got an FXF 550w core edition so I don't got too much headroom for overclocking. If I were to overclock, should I overclock my GPU or CPU for the best performance increase?

Thanks for your replies!